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The first time the Fragment queries LoaderManager by its initLoader() method, a new Loader is created using onCreateLoader() (if a Loader with the given ID already exists, simply return the old instance without calling this method). From now on, Loader follows the state of the Fragment (it will be stopped when the Fragment will be stopped) and will call the onLoadFinished() method when the data is ready. In the preceding example, the list is updated with the array containing news built on loadInBackground().

A more sophisticated approach would be to use the resource system in order to set appropriate Boolean variables with values of interest. isHoneycomb) This can be used directly in the code. Loader (Should know) In this task, we'll show the use of the class called Loader, a class specifically intended to do asynchronous work in the background in order to update the application-related data; before the introduction of the Loader and related classes, the only way to manage data was using Cursor with some specific Activity class's method: public void startManagingCursor(Cursor) public Cursor managedQuery(Uri, String, String, String, String) The problem with this approach is these calls are on the main application thread and can make the application non-responsive and potentially cause the dreaded ANRs!

All Android developers fight against the ANR (Application Not Responding) message that is presented when the UI is not responsive for more than 5 seconds. Following Android's documentation, there are only two rules to follow to avoid the ANR: ff Do not block the UI thread ff Do not access the Android UI toolkit from outside the UI thread These two rules can seem simple, but there are some particulars that have to be clear. First of all, let me show you the simplest way to create a new thread, using the class named Thread.